python处理图片之PIL模块简单使用方法

#!/usr/bin/env python  #encoding: utf-8 import Image  class myimg:   def __init__(self, open_file, save_file):     self.img = Image.open(open_file)     self.save_file = save_file   def Change_Size(self, percent=100, height=None, width=None):     '''''     percent：以百分比来决定大小     height， width:以指定的高、宽来决定大小     '''     if not (height and width):       width,height = self.img.size       new_img = self.img.resize((width*percent/100,height*percent/100),Image.BILINEAR)     new_img.save(self.save_file)   def Rotation(self, angle):     '''''     angle： 旋转的度数     '''     rot_img = self.img.rotate(angle) #旋转     rot_img.save(self.save_file)   def Save_as(self, filename):     '''''     filename: 另存为图片格式，直接根据后缀名来     '''     self.img.save(filename)    def Draw_Something(self):     '''''         利用ImageDraw来画图形     '''     import ImageDraw     draw = ImageDraw.Draw(self.img)     width,height = self.img.size     draw.line(((0,0),(width-1,height-1)),fill=255) #画直线     draw.line(((0,height-1),(width-1,0)),fill=255)     draw.arc((0,0,width-1,height-1),0,360,fill=255) #画椭圆     self.img.save(self.save_file)   def Enhance_Something(self):     '''''         利用 ImageEnhance来增强图片效果     '''     import ImageEnhance     brightness = ImageEnhance.Brightness(self.img)     bright_img = brightness.enhance(2.0) ##亮度增强     bright_img.save(self.save_file)     sharpness = ImageEnhance.Sharpness(self.img)     sharp_img = sharpness.enhance(7.0) #锐度增强     sharp_img.save(self.save_file)     contrast = ImageEnhance.Contrast(self.img) #对比度增强     contrast_img = contrast.enhance(2.0)      contrast_img.save(self.save_file) if __name__ == "__main__":   file_name = r"D:/test.png"   save_file = r"D:/save.png"   saveas_file = r"D:/save_as.bmp"   oimg = myimg(file_name, save_file)   oimg.Change_Size(30)   oimg.Rotation(45)   oimg.Save_as(saveas_file)   oimg.Draw_Something()   oimg.Enhance_Something()